Castle Lake Weather Forecast

    • 54
    • 83

    Increasing Clouds

    • 44
    • 70

    Mostly Cloudy

    • 44
    • 71

    Mostly Sunny

    • 48
    • 76

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

Today 2 May Upper Columbia Basin

Sunny. Highs in the lower to mid 80s. East wind 5 to 10 Mph.

Tonight 2 May Upper Columbia Basin

Partly cloudy with a 20 percent chance of rain Showers. Lows in the lower to mid 50s. South wind 5 to 10 Mph. Gusts up to 25 Mph overnight.

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Castle Lake Temperature Statistics

May Temperature

Ephrata, Ephrata Municipal Airport (21.7 miles)

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  • Average May

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Climate (2020–Present)

Ephrata, Ephrata Municipal Airport (21.7 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.3 °F
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